I think JWP is going to have to explain more. As far as I can tell it's pretty basic genetics that HC is going to end up with seeds that are exactly identical to the clones. Not phenos, no weirdness, exactly the same. Maybe I'm not remembering my 1st year biology stuff, but here's how I see it...
Each piece of DNA can have four states. A, C, G and T. Read the wikipedia article on genetics for the details. Say our (trivial) example plant only has 6 pieces in it's DNA. Plant 1 (call it the father) has a state of AAACGT. Plant 2 (the mother) is AACCGG. When they mate, you get a random selection of either piece from plant 1 or plant 2 in each gene location. In this case, the possible combinations would be:
1st gene: Father = A, Mother = A, therefore child MUST be A
2nd gene: A, A = A
3rd gene: Father = A, Mother = C, therefore some children will be A, some C
4th gene: Both C
5th gene: Both G
6th gene: T or G
So mating these two plants would give you four possible variations (phenotypes):
AAACGT (same as father)
AAACGG
AACCGT
AACCGG (same as mother)
Now, consider what's happening here with the colloidal silver. Plant 1 is now a father but the genetics HAVE NOT CHANGED. So lets say it's DNA sequence is AAACGT. Plant 2 is the mother, but it's the same plant. The genetics are AAACGT. Put the two together, and the ONLY POSSIBLE COMBINATION is AAACGT. There will not be any variation, as there is not any possible extra options to choose from.
I agree with the first paragraph and now I have just edited, the last paragraph as well.